Mathematics
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    9*x^3-2*x^2+9x>10
    110Y+75(100-Y) ≥9250;100Y+60(100-Y)≤8080
    110Y+75(100-Y)≥9250
    100Y+60(100-Y)≤8000
    2^X-2≥15
    2^X-2≥27
    35a+25(50-a)<1350
    2^X-2≥28
    2^X-2≥100
    16(1-x)1500(1+30%)+20(1-x)1000(1+20%)≥43680
    40 * n + 10( 8 - n ) ≥200
    40n+(8-n)≥200
    2-x^2>0
    [(2x+7)/3]-[(1+3x)/2]>1
    2(x+1)>-3
    2^X-2≥58
    5/4-[(3x+1)/6]>[(2x-1)/12]-3/8
    2^X-2≥100
    15+2(7+5x)≤2x+(5-3x)
    -p^2+p-2/9>0

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